diff --git a/operator-context.go b/operator-context.go
index 20b1e1d..68de8a9 100644
--- a/operator-context.go
+++ b/operator-context.go
@@ -11,7 +11,7 @@ func newContextTerm(tk *Token) (inst *term) {
 		tk:       *tk,
 		children: make([]*term, 0, 1),
 		position: posPrefix,
-		priority: priPrePost,
+		priority: priIncDec,
 		evalFunc: evalContextValue,
 	}
 }